Give me doodle suggestions!

I've challenged myself to post a small Homestuck doodle on tumblr every day, right now i have a 18-day-long streak!

https://www.tumblr.com/daily-homestuck-doodles

If you have any suggestions, prompts etc feel free to drop them here or in my askbox (please no epilogue/hs2 etc stuff though, i've only read the original comic)

Here's some drawings i've posted so far!